It's been previously reported in other publications in bits and pieces, but Salon pulls it all together in a story today about how Karl Rove and others use non-federal e-mail accounts to avoid having their correspondence made public. From the Salon piece by Sidney Blumenthal:
The discovery of a hitherto unknown treasure-trove of e-mails buried by the Bush White House may prove to be as informative as Nixon's secret White House tapes. Last week the National Journal disclosed that Karl Rove does "about 95 percent" of his e-mails outside the White House system, instead using a Republican National Committee account. What's more, Rove doesn't tap most of his messages on a White House computer, but rather on a BlackBerry provided by the RNC. By this method, Rove and other White House aides evade the legally required archiving of official e-mails. The first glimmer of this dodge appeared in a small item buried in a January 2004 issue of U.S. News & World Report: "'I don't want my E-mail made public,' said one insider. As a result, many aides have shifted to Internet E-mail instead of the White House system. 'It's Yahoo!, baby,' says a Bushie."
The offshoring of White House records via RNC e-mails became apparent when an RNC domain, gwb43.com (referring to George W. Bush, 43rd president), turned up in a batch of e-mails the White House gave to House and Senate committees earlier this month. Rove's deputy, Scott Jennings, former Bush legal counsel Harriet Miers and her deputies strangely had used gwb43.com as an e-mail domain.
The production of these e-mails to Congress was a kind of slip. In its tense negotiations with lawmakers, the White House has steadfastly refused to give Congress e-mails other than those between the White House and the Justice Department or the White House and Congress. E-mails among presidential aides have been withheld under the claim of executive privilege.
When I worked in the Clinton White House, people brought in their personal computers if they were engaged in any campaign work, but all official transactions had to be done within the White House system as stipulated by the Presidential Records Act of 1978. (The PRA requires that "the President shall take all such steps as may be necessary to assure that the activities, deliberations, decisions, and policies that reflect the performance of his constitutional, statutory, or other official or ceremonial duties are adequately documented and that such records are maintained as Presidential records.") Having forsaken the use of Executive Office of the President e-mail, executive privilege has been sacrificed. Moreover, Rove's and the others' practice may not be legal.
The revelation of the gwb43 e-mails illuminates the widespread exploitation of nongovernmental e-mail by Bush White House officials, which initially surfaced in the investigations and trial of convicted Republican super-lobbyist Jack Abramoff.